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Article

Green Synthesis of Silver Nanoparticles Using Natural Extracts with Proven Antioxidant Activity

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Department of Analytical Chemistry, Medical University of Lublin, Chodźki 4A, 20-093 Lublin, Poland
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Department of Geotechnics, Civil Engineering and Architecture Faculty, Lublin University of Technology, Nadbystrzycka 40, 20-618 Lublin, Poland
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Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland
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Chair and Department of Anatomy, Medical University of Lublin, 20-090 Lublin, Poland
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Faculty of Medicine, Medical University of Lublin, 20-090 Lublin, Poland
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Department of Biology and Genetics, Medical University of Lublin, Chodźki 4A, 20-093 Lublin, Poland
*
Author to whom correspondence should be addressed.
Academic Editor: Antonio Zuorro
Molecules 2021, 26(16), 4986; https://doi.org/10.3390/molecules26164986
Received: 21 July 2021 / Revised: 14 August 2021 / Accepted: 15 August 2021 / Published: 17 August 2021
Natural extracts are a rich source of biomolecules that are useful not only as antioxidant drugs or diet supplements but also as complex reagents for the biogenic synthesis of metallic nanoparticles. The natural product components can act as strong reducing and capping substrates guaranteeing the stability of formed NPs. The current work demonstrates the suitability of extracts of Camellia sinensis, Ilex paraguariensis, Salvia officinalis, Tilia cordata, Levisticum officinale, Aegopodium podagraria, Urtica dioica, Capsicum baccatum, Viscum album, and marine algae Porphyra Yezoensis for green synthesis of AgNPs. The antioxidant power of methanolic extracts was estimated at the beginning according to their free radical scavenging activity by the DPPH method and reducing power activity by CUPRAC and SNPAC (silver nanoparticle antioxidant capacity) assays. The results obtained by the CUPRAC and SNAPC methods exhibited excellent agreement (R2~0.9). The synthesized AgNPs were characterized by UV-vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), dynamic light scattering (DLS) particle size, and zeta potential. The UV-vis absorption spectra showed a peak at 423 nm confirming the presence of AgNPs. The shapes of extract-mediated AgNPs were mainly spherical, spheroid, rod-shaped, agglomerated crystalline structures. The NPs exhibited a high negative zeta potential value in the range from −49.8 mV to −56.1 mV, proving the existence of electrostatic stabilization. FTIR measurements indicated peaks corresponding to different functional groups such as carboxylic acids, alcohol, phenol, esters, ethers, aldehydes, alkanes, and proteins, which were involved in the synthesis and stabilization of AgNPs. Among the examined extracts, green tea showed the highest activity in all antioxidant tests and enabled the synthesis of the smallest nanoparticles, namely 62.51, 61.19, and 53.55 nm, depending on storage times of 30 min, 24 h, and 72 h, respectively. In turn, the Capsicum baccatum extract was distinguished by the lowest zeta potential, decreasing with storage time from −66.0 up to −88.6 mM. View Full-Text
Keywords: green synthesis; silver nanoparticles; antioxidant capacity; reducing power; DPPH scavenging activity; silver nanoparticle antioxidant capacity; CUPRAC; nanoparticle size; zeta potential; SEM; FTIR; UV-Vis green synthesis; silver nanoparticles; antioxidant capacity; reducing power; DPPH scavenging activity; silver nanoparticle antioxidant capacity; CUPRAC; nanoparticle size; zeta potential; SEM; FTIR; UV-Vis
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MDPI and ACS Style

Flieger, J.; Franus, W.; Panek, R.; Szymańska-Chargot, M.; Flieger, W.; Flieger, M.; Kołodziej, P. Green Synthesis of Silver Nanoparticles Using Natural Extracts with Proven Antioxidant Activity. Molecules 2021, 26, 4986. https://doi.org/10.3390/molecules26164986

AMA Style

Flieger J, Franus W, Panek R, Szymańska-Chargot M, Flieger W, Flieger M, Kołodziej P. Green Synthesis of Silver Nanoparticles Using Natural Extracts with Proven Antioxidant Activity. Molecules. 2021; 26(16):4986. https://doi.org/10.3390/molecules26164986

Chicago/Turabian Style

Flieger, Jolanta, Wojciech Franus, Rafał Panek, Monika Szymańska-Chargot, Wojciech Flieger, Michał Flieger, and Przemysław Kołodziej. 2021. "Green Synthesis of Silver Nanoparticles Using Natural Extracts with Proven Antioxidant Activity" Molecules 26, no. 16: 4986. https://doi.org/10.3390/molecules26164986

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